2012 World Junior Championships in Athletics – Men's javelin throw

The men's javelin throw at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 12 and 13 July.

Records
, the existing world junior and championship records were as follows.

Qualification
Qual. rule: qualification standard 72.00 m (Q) or at least best 12 qualified (q)

Participation
According to an unofficial count, 46 athletes from 35 countries participated in the event. • 🇦🇷 argentina (1)

• 🇦🇲 armenia (1)

• 🇦🇺 australia (2)

• undefined (2)

• undefined (1)

• 🇧🇷 brazil (1)

• 🇨🇦 canada (2)

• undefined (1)

• 🇨🇳 china (1)

• undefined (2)

• 🇫🇮 finland (2)

• 🇩🇪 germany (2)

• 🇭🇺 hungary (1)

• 🇮🇸 iceland (1)

• 🇮🇳 india (1)

• 🇮🇹 italy (1)

• 🇯🇵 japan (1)

• undefined (2)

• 🇱🇹 lithuania (1)

• undefined (2)

• 🇳🇴 norway (1)

• 🇵🇱 poland (1)

• 🇷🇴 romania (1)

• 🇸🇰 slovakia (2)

• undefined (2)

• undefined (1)

• 🇰🇷 south korea (1)

• 🇪🇸 spain (1)

• 🇸🇪 sweden (1)

• 🇸🇾 syrian arab republic (1)

• undefined (1)

• 🇹🇷 turkey (1)

• 🇺🇦 ukraine (1)

• undefined (1)

• 🇺🇸 united states (2)